Eliterglass-How to Choose the PVB Interlayers Thick of Laminated Glass

These days one of our customers asked price for 3.2+2.28PVB+3.2MM clear laminated glass,

But we suggest changing the glass combination to 4+0.76 Trosifol PVB+4mm for the below reasons:

1. PVB is a soft material

The thicker interlayer used in laminated glass, the inferior tensile bonding strength, and shear bonding strength.

2. Multi-layer PVB won’t help much in acoustic performance

The glass thickness is the most important factor deciding the final soundproof performance, but not PVB thickness.

3. Multi-layer PVB results in a higher price

Even though most factories use China brand PVB, but 6 layers PVB price is about 3 layers international brand price.

4. Bad Quality

As a glass processor, I have to say, most China PVB brands cannot pass the boiling water test.

For international certificate applications and tests, the factory will use Saflex or Trosifol and prepare samples specifically.

For bulk orders, it’s hard to pass the test if you test the pieces cut from bulk orders.

Our suggestion, is to change to 4+0.76 Trosifol +4, total thickness is 8.76mm, almost equivalent to original glass, but you’ll have an extra benefit:

1. Cheaper price than 6 layers China PVB ones.

2. More reliable quality.

3. Extra clear color appearance.

4. Better shear bonging strength and tensile bonding strength.

5. Worry-free after-sales for superior quality.

6. Better soundproof performance.

Many customers don’t know clearly the PVB thickness used in their projects,

Here we conclude and offer recommendations as below:

Float Glass Laminated Glass.

The selection of PVB thickness for float glass laminated glass should follow the below tables, bulletproof glass, glass for aquariums, and multilayer laminated glass are excluded.

Even though float glass is quite a flat side,0.38mm and even 0.25mm PVB thickness is enough to bond glass together, but for thicker glass, heavy weight&large panels require thicker PVB to get a better bonding effect.

Flat Heat-treated Laminated Glass

Heat-treated glass products, due to the inevitable glass wave and bow deformation during the tempering process, the gap between the glass caused by this deformation will be filled by the PVB film.

Especially when laminating coated glass, silkscreen glass, or laminating unequal thickness glass, the glass overall bow will be more obvious and require thicker PVB.

Remark:

In order to ensure that the glass don has edge degumming or bubbles during the warranty period, and to ensure the safety performance of the glass, avoid potential safety hazards and future losses, the selection of PVB film should be strict.

It’s not suggested to use a glass combination, When the thickness of the two pieces of glass differs by more than 3mm, an extra 0.38mm PVB should be added based on the above table.

For special-shaped tempered and heat-strengthened laminated glass, the thickness of PVB must be increased by 0.38mm because of the greater deformation at the edge of shaped glass.

When the glass height and width are both greater than 800mm and the ratio is close to 1, it is difficult to control the glass waveform, greater deformation will occur, The thickness of PVB must be increased by 0.38mm.

Curved Heat-treated Glass, Hot Bending Glass

Curved tempered laminated glass is increasingly used in construction because of its unique structure and good safety performance, but it also brings many problems.

Many bent and tempered laminated glass has edge cracking and bubbles shortly after installation, which brought huge losses to both manufacturers and owners.

Curved heat-treated glass has a curvature due to the glass itself, the curvature error and the existence of tempering deformation determine that the thickness of the PVB film in the middle is thicker than that of ordinary laminated glass, and its minimum thickness is 2.28mm.

 

Confirming the PVB thickness is important, but selecting the right PVB brand is also quite important. Reputable China PVB brands include Decent, KB, and international brands-Trosifol, Saflex, Sekisui, etc.

Besides PVB, we offer functional PVB products such as acoustic PVB, Solar control PVB, colorful PVB, etc. Kindly contact us if you cannot confirm the right PVB thickness for your project.

 

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Eliter Glass, is an excellent architectural and interior glass provider, manufacturer,

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